Water circulating



( No Model.) 4 Sheets-Sheet 1.

D. B. MO'RISON= WATER UIRGULATING, FEEDING, AND DISGHARGING APPARATUS FOR STEAM BOILERS.

' No. 523,915 7 Patent 1894.

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D. B. MORISON. WATER GIRCULATING, FEEDING, AND DISOHARGING APPARATUS FOR 9 8 l 3 Y 1 u u d 6 b n m 5 1 3 2 5 nw N fieraziar (no Model.) 4 Sheets-Sheet. a.

- D. B. MO'RISON. v WATER UIRQULATING, FEEDING, AND DISUHARGING APPARATUS FOR STEAM BOILERS.

No. 523,915. Patented July 31, 1894.

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(No Model.) 4 Sheets-Sheet 4. .D. B. MORISON.

WATER GIRGULATING,- FEEDING, AND DISOHARGING APPARATUS FOR STEAM BOILERS.

PatenteQQJuIy 31., I894.

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UNITED STATES PATENT OFFICE,

DONALD BARNS MORI SON, OE HARTLEPOOL, ENGLAND.

WATER CIRCULATING, FEEDING, AND DISCHARGING APPARATUS FOR STEAM-BOILERS- SPECIFIGATION forming part of Letters PatentNo. 523,915, dated July 31, 1894.

Application filed December 4, 1893- Serial No. 492,685- (No model.) Patented in England July 30, 1892, No. 13,923 i in Germany August 19, 1892, No. 67,392; in Belgium September 5, 1892, No. 101,231; in Norway September 5, 1892, No. 2,887, in France September 12, 1892, No. 224,279 in Sweden September 24, 1892, No. 4,552; in Italy November 15, 1892.170. 82,909,

and in Austria-Hungary August 12, 1893, No. 34,238.

To all whom it may concern:

Be it known that I, DONALD BARNS MORI- SON, a subject of the Queen of Great Britain and Ireland, residing at Hartlepoohin the county of Durham, England, have invented Improvements in Water Circulating, Feeding, and Discharging Apparatus for Steam-Boilers, (for which I have obtained Letters Patent in Great Britain, No. 13,923, dated July 30, 1892 tria-Hungary, No. 34,233, dated August 12,

1893,) of which the following is a specification.

My invention has for objects to cause rapid circulationof water in and discharge of water from a steam boiler or steam boilers obtain rapid circulation, or the circulation of.

by means of apparatus located outside the boiler or boilers, and to prevent the water within the said boiler or boilers from being withdrawn below a predetermined level. For this purpose in boiler water circulating ap paratus in which water from the boiler is mixed with the feed water on its passage from the feed pump to the boilers in order to a maximum quantity of water, I arrange between the discharge valve on the feed pump and the feed check valve on the boiler, an air vessel which is connected to the water space in the boiler through a non-return valve sothat on the pressure in the air vessel falling below the pressure in the boiler or boilers, there will be an inflow of water from the boiler or boilers to the air vessel. The discharge from the boiler may be caused to enter the top of the air vessel so that a maximum quantity of water will flow into it by reason of a minimumof resistance, but the discharge may also flow into the water space of the air vessel orinto the feed pipe in connection with the air vessel, without departing from the spirit of the invention.

When two or more boilers are provided when circulating water by a donkey pump,

as when raising steam, or .by any other form of circulating or discharge apparatus in which this danger exists, I employ the following means:-Instead of withdrawing the water through a pipe connected directly with the water space at or near the boiler bottom, I withdraw it through a pipe that is so arranged within or without, the boiler that its open lower end terminatesin the water space near the bottom of the boiler'while its upper open end terminates at a point above the normal water level, that is to say in the steam space of the boiler, so that both ends of the pipe being in free communication with the top and bottom of the boiler, the pressure in the pipe will be equal to that in the boiler and the water level in the pipe will be the same as that in the boiler. The outlet of this pipe is located at or about the lowest safe level of water in the boiler and it is'placed in communication with the air vessel of the feed pump, or it may be connected directly with the feed pipe, or to the donkey pump.

I do not confine myself to the use of the above described pipe, which I term a safety pipe, in combination with the water circulating apparatus, as thelatter may be used without such safety pipe.

When the safety pipe is arranged inside the boiler, it is preferably constructed in the following mannerz-On the inside of the boiler and in communication with the outlet pipe is arranged a tubular junction piece the upper open end of which is connected to a pipe terminating in the steam space of the boiler, while to its lower end is attached an open pipe which terminates in the lower part or water space of the boiler, and which also projects upward inside the body piece to the lowest safe working level of the water in the boiler. The connection to the outlet or discharge pipe is or may be at the lower end of the junction piece,but below the level of the internal projecting pipe which terminates at the safe working level.

When it is required to circulate or discharge water from two or more levels in the boiler Iarrange on'the side of the boiler shell, a cock having at its lower part two branches. to which are attached two pipes terminating at diiferent levels in the lower .part of the boiler. The upper branch of the cock is connected to the lower end of the junction piece. It will be obvious thatthis arrangement will p rm t of th m nt ing blo n ou om the bottom of the boiler when required, a suitable blow-off valve being arranged at the 1 outlet from the junction piece adjoining the .tersthe water space of the air vessel, provision may advantageously be made for extracting oil or other impurities from the feed water, as in this case the mixing of the two- 'flnid s at different temperatures will cause a violent disturbance in the air vessel with the nesult chat the oilor other impurities-will be driven to the surface of the water from whence they can be discharged through a suitably arranged scum cock.

In the accompanying drawings, Figure 1 shows in side elevation apparatus according to my invention applied to an engine and boiler, thelatter being shown partly in section. Fig.2 isan end elevation partly in section, of a boiler showing an arrangement of safety pipe therein. Figs. 3 and 4 show respect- .ively in sectional elevation and plan, an air vessel in which the discharge water from the boiler is delivered into :the air space of such 1 vessel. Figs. 5and 6 are corresponding views of an air vessel in which the discharge wateri from the boiler enters the water'space of the 1; said vessel. Figs. 7 and 8 are sectional views, of .a cock such as hereinbefore referred to, ar- 2 ranged on the side of the boiler. Figs. 9 to. lflinclusive are detail views of junction pieces 1 for use with safety pipes arranged inside the boiler. Figs. 1 and 2 are drawn to a smaller} scale than the remaining figures.

Referring to Figs. land 2, a is anair vessel arranged between the discharge valve 19 of a1 single acting feed pump 0 and the feed pipei dand feed check valve 01* on the boiler e.j f

This air vessel or is connected to the water: space of the boiler through a valve f, pipe 9 r and nonreturn valve h. The non -return: valve h, aswill be seen more clearly in Fig. 1 2, is in communication with a tubular junc-i tion piece is arranged inside the boiler andto which is connected the open pipe lterminating in the steam space of the boiler, and the pipem which projects upward inside the junction piece to the safe level n n, and is connected at its lower end to a cock or valve 0. To this cock 0 there are connected the open pipes 19 and g which terminate at different levels in the lower part of the boiler. A blow off valve r isarranged in the valve case containing the circulating valve h, a pipe 3 leading from this blow-off valve to any desired outlet. With this arrangement, on the downward or forcing stroke of the feed pump a, water will be forced into the feed pipe (1, and the pressure in the air vessel a will rise considerably above the pressure in the boiler, and on the upward or suction stroke of the P p, the he k valved wil close anaeroact n wi l take plsce i the r sul t h pres u e of he a i he a r ves el w ll, for a brief period, fiallzto such an extent at te i l flow from-the boi er into 11 a r e o t t et edpine incl seirremmity h e a s e case may Only one o le is sho n tbedrawin but it is to be und rstoo tha hen two. or m e r u d, ea h i providedvitheelwck valv 0 e urn valve h, safety n ne kl m withcoc 0 and p pes p, qand blow-off valve r, these parts being connected with the feed p p a d d s ha ge p p 0 by' rarch pipes d'and g" respectively-so that :the air vesselcand feed pump are com-Iconic all the boilers.

The arrangement shown in Figs. 1 and2is specially suitable for use in cases wherewtwo or more boilers are employed, water flowing from the bottom of each boiler through the pipe 19 therein, coeko, pipe rm. and from the inside of the junction piece through the valve h to the corresponding pipes g gand- "thence to the airvessela. With the arrangement described it will beseen that unde fino circumstances can the level of the water indicated by the line it he reduced "below the lowest safe level n, n.

hen it is required to blowofl an-ysediment or othei' foreign matter trom the bottom of the boiler, the branch of the cock .0 in communication with the pipe 19 is closed and :thatcomrnunicating with pipe q opened. The circulating valve h is also shut and the blow 0E cock r opened so that the sediment mixed with water will then bedischarged through the said valve fl.

- With the construction of air vesselashown in Figs. 3 and at the discharge from thetboiler enters the topof this vessel throughthe-valve and discharge pipe f and after mixing with the feed water in the lower parut-hereof, is delivered to the boilerior boilers through the opening d which is in communication with the feed pipe (2 or cl d as the case maybe.

In the construction of air vessel shown in Figs. 5 and 6 the discharge water from the boiler enters the water space ofthe air vessel through the valve f and pipef. Such an arrangement as this may advantageously be used in connection with means for extracting oil or other impurities from the feed water. For this purpose the air vessel is fitted with a scum cock 6 and gage glass u.

The mixing of the two liquids at diiferent temperatures causes a violent disturbance in the air vessel with the result that the oil,impurities or other matter in the water will be driven to the surface of the water and can thence be expelled through the scum cock 25.

Figs. 7 and 8 show the construction of the cock 0 which is attached to the inside of the boiler e. This cock is provided with two branches 0 and 0' which are placed in communication with the lower part of the boiler by the pipes pand gas already described, and with a branch 0 which is placed in communication with the junction piece It by the pipe m.

The junction piece lc-which may be constructed with an upwardly projecting internal pipe m as shown in Figs. 9 and 10 is provided with a branch It for attachment to the pipe Z (Fig. 2) that is in communication with the steam space of the boiler and with a flange 7.5 that is attached to the shell of the boiler so as to be in communication with the valve case containing the circulating valve h and blowoff valve 1". To the lower end or branch 10 of the said junction piece is connected the upper end of the pipe m. Or this pipe may extend into the said junction piece as shown in Fig. 2.

Fig. 11 shows a modified construction of junction piece in which the position of the branch 10 is arranged nearer to the top thereof than in Figs. 9 and 10 so as to suit varying requirements, and another branch 10 is provided for blowing out any sediment which might accumulate in the bottom of the said junction piece.

Fig. 12 shows a further modification in which thej unction piece is made much shorter than in the previous arrangements in order to adapt it to special applications.

What I claim is-- 1. Water circulating, feeding and discharging apparatus for a steam boiler comprising 'a single acting water feeding device, a feed pipe with check-valve connecting the delivery of said device with said boiler, an air vessel in communication with the delivery outlet of said water feeding device, and a water discharge pipe connecting the water space of said boiler with said delivery passage and provided with a non-return valve substantially as herein described. 2. Water circulating, feeding and discharging apparatus for a steam boiler comprising a single acting feeding device, a feed pipe with check valve connecting the delivery of said device with said boiler,-an air vessel in communication with the delivery outlet of said- .circulating apparatus substantially as herein described for the purpose specified.

4. Water circulating, feeding and discharging apparatus for a steam boiler, comprising-a single acting feed water pump, a feed pipe with check-valve connecting the delivery of said pump with said boiler, an air vessel and a discharge pipe in connection with said delivery, a safety pipe connected at its upper and lower ends respectively with the steam and water spaces of said boiler and having its discharge outlet arranged at a predetermined distance below the normal water level in said boiler and connected with said discharge pipe substantially as herein described for the purpose specified.

5. Water circulating and discharging apparatus for a steam boiler, comprising a feed pump having its delivery in connection with the boiler through a check-valve, a discharge 4 pipe connected with said delivery,a blow-off pipe, a safety pipe having its upper end in communication with the steam space of said boiler, its lower end connected with two lower pipes terminating at different levels in the lower part of said boiler,.and its outlet arranged at a predetermined distance below the normal water level, a valve controlling the communication between said pipes and the lower end of said safety pipe, and discharge and blow-off valves controlling the communication between said outlet and said discharge and blow-off pipes respectively substantially as herein described.

6. In water circulating apparatus for steam boilers, the combination with a single acting water feedingv device having its delivery in connection with a boiler through a pipe pro vided with a check-valve, of an air-vessel arranged between said delivery and checkvalve, a discharge pipe connecting the water space of said boiler with the water space of said air vessel and provided with a non-return valve, and a scum cock connected with said air vessel substantially as herein described for the purpose specified.

7. In water circulating apparatus for steam boilers the combination with the discharge and blow-0T1" pipes of each boiler, and the wa ter circulating pump and delivery pipes, of a IIO ,ksafetypipe arranged within each bniler an comp flfl'ing (the j-unfitionpieee k with outlet 16 andplipes Z m pipjes p and q w i t11 cock 0 a1 .I. T. NEWBEGIK,

Cashier, ,West Hartlepool.

raqgg as described, and d'isohargeand blow- 5 0E malvpshand rcontrplliqg the communication between said outletk and said dis-1 charge and blow 0E pipes respectively sub-ii stantial yas herei-ndescribed. 1 In testimony whereof 'I have signed my 3- 

